Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b58c2b2337866dc…

MALICIOUS

PDF

46.6 KB Created: 2020-08-06 06:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73e5e0c27cf7f9c377299904454eb4f2 SHA-1: a3df3942177382f06881eeed57a40656c7e66e60 SHA-256: 2b58c2b2337866dce900a5c9f89178c07f936f59724910f9ed5c82c9f6cb3fa3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=pulmonary%20hypertension%20neonatal%20pdf', which is likely intended to trick the user into clicking it. The presence of numerous other PDF links, many hosted on Shopify, suggests a SEO-based lure to disguise malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=pulmonary%20hypertension%20neonatal%20pdf In PDF document text
    • http://files.mysteifflife.com/uploads/1/3/1/4/131452887/kodazoxevego.pdfIn PDF document text
    • http://files.briggsquarterhorses.com/uploads/1/3/1/4/131409127/5858127.pdfIn PDF document text
    • http://files.solutionktech.net/uploads/1/3/1/6/131606331/6396622.pdfIn PDF document text
    • http://files.fullcirclesynthetics.com/uploads/1/3/1/4/131453213/xasubaloli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/kavufesoxirifigugax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/dititex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/45524522577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/aprender_a_leer_las_cartas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6272/8606/files/48253058110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/kelaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/nintendo_switch_reset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/zozixarojamux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/jewisamazumifarufemosaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/3289617970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/8542937040.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000770c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770C 5384 bytes
SHA-256: 34c69ab9aba0208a619c0125ee4399fa5c7bfda5aa83b07ba5f86c4fa689e059
font_01_sfnt_off0000892f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892F 10864 bytes
SHA-256: d48a7490abece117bf96b9060b532b3d2749f8bd36c5964c94e77762796f24ef

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